Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f4ac6a9c35fd29…

MALICIOUS

PDF

36.9 KB Created: 2020-04-09 06:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7bdc8f6d410dd77d2dc63efa49f1f286 SHA-1: 2b41329fd6dbf7da8c01f35729a217e8ec9d33f8 SHA-256: 65f4ac6a9c35fd2990f1ce3bfe0006c447dfaa74af994cf98e8f42be63835c90
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to seemingly unrelated domains and are structured as PDF files. The document body also contains a URL that appears to be a lure for downloading software. This indicates a link farm or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://spartanscience6.info/uploads/1/3/0/6/130620275/130620275.html#borland+turbo+c+++download
    • http://5stepstosuccessfultrading.com/uploads/1/3/0/9/130969701/ziwiresexajedo_pukubokorowa_xufulax_lapebazum.pdf
    • http://restylebylawson.com/uploads/1/3/0/5/130589373/sexomijinokete.pdf
    • http://sensecomposites.com/uploads/1/3/1/4/131408537/tagag.pdf
    • http://mindfulnessbeginnings.com/uploads/1/3/0/6/130639121/nikokigotojanadija.pdf
    • http://taini.org/uploads/1/3/0/5/130550797/9468171.pdf
    • http://mykitchenremodelsandiego.com/uploads/1/3/0/8/130873843/1251056.pdf
    • http://pretty-little-rose-bowtique.com/uploads/1/3/0/7/130775342/muburoxazelo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066bf.bin
7c0ba4996b2a1d27484a33c7875c44ca1e07aa5291ea84527b6f06b742e500cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66BF 8512 bytes

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